Last week I bought a Peavey Penta w/matching 4x12, but lately I've been GASing for a 5150. I know I probably won't find a used 5150 any time soon, but a local shop has a 6505. Keep in mind that I play old style punk rock (see my sig) and my favorite tones are Marshall Plexi and JCM 800. Should I trade in the Penta for the 6505? Is the Penta closer to Marshall than the 6505?